@Djinni, TIL is a subreddit more than a commonly used random abbreviation, a simple Google search would have revealed that. Also "used as a space saver on websites such as Reddit or DIGG when writing the titles of links to interesting things...". I have no idea how people keep up with those kind of abbreviations, how do you remember "lol"?
I don't mind actual useful abbreviations but it annoys me when people start adding stuff that makes no sense and is completely made up like adding "Z" to the end of "lol" and various other things, similar to leetspeak.
Anyways, off-topic as you said but I figured I'd just lightly touch on the subject since it was brought up